Touch display device

ABSTRACT

Discussed is a touch display device that can include a substrate including an active area and a non-active area, a transistor disposed on the substrate, a sub-pixel electrically connected to the transistor, and including an organic light emitting diode, an encapsulation layer disposed on the organic light emitting diode, a planarization layer disposed on the encapsulation layer, and a plurality of touch electrodes disposed between the encapsulation layer and the planarization layer, the plurality of touch electrodes including an open area. The planarization layer can include a thickness variation at the open area of the plurality of touch electrodes.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a Continuation Application of U.S. patentapplication Ser. No. 18/082,400, filed on Dec. 15, 2022, which is aContinuation Application of U.S. patent application Ser. No. 17/090,660filed on Nov. 5, 2020 (now U.S. Pat. No. 11,581,515), which claimspriority to Korean Patent Application No. 10-2019-0140971, filed on Nov.6, 2019, the entire contents of all these applications are herebyexpressly incorporated by reference into the present application.

BACKGROUND Field

Embodiments of the present disclosure relate to a touch display device.

Description of Related Art

Along with developments of the information, the demands for displaydevices for displaying images are more and more increasing in variousforms, and in recent years, a variety of display devices such as e.g.,liquid crystal displays, plasma displays, and organic light emittingdisplays are in wide use.

Among these display devices, getting out of the conventional input meanssuch as e.g., buttons, a keyboard, mouse, or the like, there has beenoften used a touch display device to provide a touch-based input methodthat allows its user to easily and intuitively input information orinstructions.

An advantage of such a touch display device is the ability to display animage while allowing inputting by touching thereon. However, thoseconventional touch display devices can be subject to some difficulty insecuring enough light emitting area for displaying an image as well asachieving improved luminance.

SUMMARY OF THE DISCLOSURE

According to an embodiment, there is provided a touch display devicewith improved luminance.

In one aspect, embodiments of the present disclosure provide a touchdisplay device having a plurality of sub-pixels, including a substrate,an insulating film, a first electrode, a bank, a light emitting layer, asecond electrode, an encapsulation layer, a touch buffer layer, aplurality of touch electrodes, and a planarization layer.

The insulating film can be disposed on the substrate. Further, theinsulating film can include at least one concave portion having a flatportion and an inclined portion surrounding the flat portion in one ofthe sub-pixels.

The first electrode can be disposed on the concave portion in theinsulating film and on the peripheral portion of the concave portion inthe one sub-pixel.

The bank can be disposed on the first electrode and the insulating film.Further, the bank can have an opening area corresponding to a part ofthe flat portion.

The light emitting layer can be disposed in the opening area of thebank. Further, the light emitting layer can be disposed on the firstelectrode.

The second electrode can be disposed on the light emitting layer andpositioned on the bank.

The encapsulation layer can be disposed on the second electrode.

The touch buffer layer can be disposed on the encapsulation layer.

The plurality of touch electrodes can be disposed on the touch bufferlayer.

The planarization layer can be disposed on the touch electrode. Further,the planarization layer can include a microlens unit positioned in anarea corresponding to the concave portion.

According to embodiments of the present disclosure, it is possible toprovide a touch display device with improved luminance, including aninsulating film including at least one concave portion having a flatportion and an inclined portion surrounding the flat portion within onesub-pixel, and a planarization layer including a microlens unitpositioned in a region corresponding to the concave portion.

Furthermore, according to embodiments of the present disclosure, it isalso possible to provide a touch display device with improved luminance,including at least one microlens partially positioned in an areacorresponding to the inclined portion of the concave portion and havinga larger diameter than the area corresponding to the inclined portion ofthe concave portion.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features, and advantages of the disclosurewill be more clearly understood from the following detailed description,taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a system configuration diagram of a touch display deviceaccording to embodiments of the present disclosure;

FIGS. 2 and 3 each are exemplary views of a touch panel TSP when a touchdisplay device according to embodiments of the present disclosure sensesany touch using a mutual-capacitance based touch sensing method;

FIG. 4 is an exemplary view of a touch panel TSP when a touch displaydevice according to embodiments of the present disclosure senses anytouch using a self-capacitance based touch sensing method;

FIG. 5 is a diagram illustrating a mesh type of touch electrode disposedon a touch panel TSP in a flexible touch display device according toembodiments of the present disclosure;

FIG. 6 is a diagram for explaining the corresponding relationshipbetween a mesh type of touch electrode and a sub-pixel disposed on atouch panel TSP in a flexible touch display device according toembodiments of the present disclosure;

FIGS. 7 and 8 each are diagrams illustrating a sub-pixel circuit of adisplay panel according to embodiments of the present disclosure;

FIG. 9 is a diagram illustrating a position of a touch electrode in adisplay panel according to embodiments of the present disclosure;

FIG. 10 is a plan view illustrating a sub-pixel and a light emittingarea included in an active area of a display panel according toembodiments of the present disclosure;

FIG. 11 is a diagram illustrating an area cut along a line A-B in FIG.10 and a part of a non-active area;

FIG. 12 is a diagram illustrating a configuration that a microlens unitis composed of at least one microlens different from that of theembodiments as set forth in FIG. 11 , in a touch display deviceaccording to embodiments of the present disclosure;

FIG. 13 is an enlarged view of an area Y of FIGS. 11 and 12 ;

FIG. 14 is a diagram illustrating an active area and a part of anon-active area extending from the active area; and

FIGS. 15 to 17 each are cross-sectional views of a touch display deviceaccording to embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the following description of examples or embodiments of thedisclosure, reference will be made to the accompanying drawings in whichit is shown by way of illustration specific examples or embodiments thatcan be implemented, and in which the same reference numerals and signscan be used to designate the same or like components even when they areshown in different accompanying drawings from one another. Further, inthe following description of examples or embodiments of the disclosure,detailed descriptions of well-known functions and componentsincorporated herein will be omitted when it is determined that thedescription can make the subject matter in some embodiments of thedisclosure rather unclear. The terms such as “including”, “having”,“containing”, “constituting” “make up of”, and “formed of” used hereinare generally intended to allow other components to be added unless theterms are used with the term “only”. As used herein, singular forms areintended to include plural forms unless the context clearly indicatesotherwise.

Terms, such as “first”, “second”, “A”, “B”, “(A)”, or “(B)” can be usedherein to describe elements of the disclosure. Each of these terms isnot used to define essence, order, sequence, or number of elements etc.,but is used merely to distinguish the corresponding element from otherelements.

When it is mentioned that a first element “is connected or coupled to”,“contacts or overlaps” etc. a second element, it should be interpretedthat, not only can the first element “be directly connected or coupledto” or “directly contact or overlap” the second element, but a thirdelement can also be “interposed” between the first and second elements,or the first and second elements can “be connected or coupled to”,“contact or overlap”, etc. each other via a fourth element. Here, thesecond element can be included in at least one of two or more elementsthat “are connected or coupled to”, “contact or overlap”, etc. eachother.

When time relative terms, such as “after,” “subsequent to,” “next,”“before,” and the like, are used to describe processes or operations ofelements or configurations, or flows or steps in operating, processing,manufacturing methods, these terms can be used to describenon-consecutive or non-sequential processes or operations unless theterm “directly” or “immediately” is used together.

In addition, when any dimensions, relative sizes etc. are mentioned, itshould be considered that numerical values for an elements or features,or corresponding information (e.g., level, range, etc.) include atolerance or error range that can be caused by various factors (e.g.,process factors, internal or external impact, noise, etc.) even when arelevant description is not specified. Further, the term “may” fullyencompasses all the meanings of the term “can”.

FIG. 1 is a system configuration diagram of a touch display deviceaccording to embodiments of the present disclosure. All the componentsof the touch display device according to all embodiments of the presentdisclosure are operatively coupled and configured.

Referring now to FIG. 1 , the touch display device according toembodiments of the present disclosure can provide an image displayfunction for displaying an image, and a touch sensing function forsensing a user's touch.

The touch display device according to embodiments of the presentdisclosure can include, for image display, a display panel DISP in whichdata lines and gate lines are arranged, a display driving circuit fordriving the display panel DISP and so on.

The display driving circuit can include a data driving circuit DDC fordriving the data lines, a gate driving circuit GDC for driving the gatelines, and a display controller D-CTR for controlling the data drivingcircuit DDC and the gate driving circuit GDC.

The touch display device according to embodiments of the presentdisclosure can include a touch panel TSP in which a plurality of touchelectrodes 320 as a touch sensor are arranged, and a touch sensingcircuit TSC to perform driving and sensing processing for the touchpanel TSP.

The touch sensing circuit TSC can be adapted to supply a driving signalto the touch panel TSP to drive the touch panel TSP, detect a sensingsignal from the touch panel TSP, and based on the detected sensingsignal, sense a presence/absence of touching and/or a touched position(coordinates of touching).

Such a touch sensing circuit TSC can be further configured to include atouch driving circuit TDC to supply a driving signal and receive asensing signal, and a touch controller T-CTR to calculate apresence/absence of touching and/or a touched position (coordinates oftouching).

The touch sensing circuit TSC can be implemented of one or morecomponents (e.g., an integrated circuit), and can be implementedseparately from the display driving circuit.

Further, all or part of the touch sensing circuit TSC can be implementedin integration with one or more of the display driving circuit or itsinternal circuits. For example, the touch driving circuit TDC of thetouch sensing circuit TSC can be implemented as one integrated circuittogether with the data driving circuit DDC of the display drivingcircuit.

In the meantime, the touch display device according to embodiments ofthe present disclosure can be adapted to sense a touch based oncapacitance formed on the touch electrodes TE (touch sensors).

The touch display device according to embodiments of the presentdisclosure can adopt a capacitance-based touch sensing scheme, whereinit can sense a touch using a mutual-capacitance based touch sensingmethod or sense a touch using a self-capacitance based touch sensingmethod.

FIGS. 2 to 4 show three types of exemplary diagrams of the touch panelTSP in the touch display device according to embodiments of the presentdisclosure, wherein both of FIGS. 2 and 3 are an exemplary diagram ofthe touch panel TSP in case the touch display device according toembodiments of the present disclosure senses a touch using amutual-capacitance based touch sensing method, and FIG. 4 is anexemplary diagram of the touch panel TSP in case the touch displaydevice according to embodiments of the present disclosure senses a touchusing a self-capacitance based touch sensing method.

Referring first to FIG. 2 , in the mutual-capacitance based touchsensing method, a plurality of touch electrodes disposed in the touchpanel TSP can be generally classified into a driving touch electrode(also referred to as a driving electrode, a transmitting electrode or adriving line) to which a driving signal is applied, and a sensing touchelectrode (also referred to as a sensing electrode, a receivingelectrode, or a sensing line) in which a sensing signal is detected anda capacitance with the driving electrode are formed.

Further, among the driving touch electrodes of the touch electrodes, thedriving touch electrodes arranged in the same row (or the same column)can be electrically connected to each other by an integration scheme (orby a connection via a bridge pattern) to form one driving touchelectrode line DEL.

Referring further to FIG. 2 , among the sensing touch electrodes of thetouch electrodes, the sensing touch electrodes arranged in the samecolumn (or the same row) can be electrically connected to each other bythe bridge pattern connection (or by the integration scheme) to form onesensing touch electrode line SEL.

In case of such a mutual-capacitance based touch sensing method, thetouch sensing circuit TSC can be adapted to apply a driving signal toone or more driving touch electrode lines DEL, receive a sensing signalfrom one or more sensing touch electrode lines SEL, and based thereceived sensing signal, detect presence/absence of a touching and/ortouched coordinates based on a change in capacitance (mutualcapacitance) between the driving touch electrode line DEL and thesensing touch electrode line SEL according to a presence/absence of anypointer such as, e.g., a finger(s), a pen(s) or the like.

Referring again to FIG. 2 , for transferring the driving signal and thesensing signal, each of the plurality of driving touch electrode linesDEL and the plurality of sensing touch electrode lines SEL can be thenelectrically connected to the touch driving circuit TDC through one ormore touch lines 230.

More specifically, in order to transfer the driving signal, each of theplurality of driving touch electrode lines DEL can be electricallyconnected to the touch driving circuit TDC through one or more drivingtouch lines TLd. Further, in order to transfer the sensing signal, eachof the plurality of sensing touch electrode lines SEL can beelectrically connected to the touch driving circuit TDC through one ormore sensing touch lines TLs.

Further, the touch display device 100 using a mutual capacitance basedtouch sensing method can be illustrated as in FIG. 3 .

Referring then to FIG. 3 , a plurality of touch electrodes 320 can bedisposed in the touch panel TSP, and touch lines 230 for electricallyconnecting the touch electrodes 320 and a touch circuit can be alsodisposed therein.

Further, in the touch panel TSP can be arranged touch pads with whichthe touch driving circuit TDC comes into contact, for electricallyconnecting the touch lines 230 and the touch driving circuit TDC.

The touch electrodes 320 and the touch lines 230 can be disposed eitherin the same layer or different layers.

Two or more touch electrodes forming one driving touch electrode line(i.e., Driving TE Line) can be referred to as a driving touch electrode(Driving TE), and two or more touch electrodes 320 forming one sensingtouch electrode line (Sensing TE Line) can be referred to as a sensingtouch electrode (Sensing TE).

At least one touch line 220 can be connected to each driving touchelectrode line, and at least one touch line 230 can be connected to eachsensing touch electrode line.

At least one touch line 220 connected to each driving touch electrodeline can be referred to as a driving touch line (Driving TL), and atleast one touch line 230 connected to each sensing touch electrode linecan be referred to as a sensing touch line (Sensing TL).

One touch pad TP can be connected to each touch line 230.

Referring then to FIG. 3 , each of the plurality of touch electrodes 320can be, for example, of a rhombus shape as viewed from the outer contourand in some cases, of a shape of rectangle (inclusive of a square), andfurther, can be of other various shapes as well.

Further, a bridge configuration for connection between two touchelectrodes 320 can include one or more bridge patterns 396.

The touch panel TSP according to the embodiments can exist inside thedisplay panel having a display area A/A and a non-display area N/A(e.g., built-in type).

When the touch panel TSP is of a built-in type, the touch panel TSP andthe display panel can be manufactured together through a single panelmanufacturing process.

Further, when the touch panel TSP is of a built-in type, the touch panelTSP can be considered as an assembly of a plurality of touch electrodes320, wherein the plate on which a plurality of touch electrodes 320 areplaced can be a dedicated substrate or any layer already present in thedisplay panel (e.g., an encapsulation layer).

Referring then to FIG. 4 , in case of a self-capacitance based touchsensing method, a respective touch electrode 320 disposed on the touchpanel TSP can serve as both of the driving touch electrode (a drivingsignal applied) and the sensing touch electrode (a sensing signaldetected).

For example, the driving signal can be applied to each touch electrode320 and the sensing signal can be received through the touch electrode320 to which the driving signal is applied. Therefore, in theself-capacitance based touch sensing method, there is no distinctionbetween the driving electrode and the sensing electrode.

In case of such a self-capacitance based touch sensing method, the touchsensing circuit TSC can apply the driving signal to one or more touchelectrodes 320, receive the sensing signal from the touch electrode 320to which the driving signal is applied, and on the basis of the receivedsensing signal, detect presence/absence of a touching and/or touchedcoordinates based on a change in capacitance between a pointer such ase.g., a finger, a pen or the like and the touch electrode 320.

Referring again to FIG. 4 , in order to transfer the driving signal andthe sensing signal, each of the plurality of touch electrodes 320 can beelectrically connected to the touch driving circuit TDC through one ormore touch lines 230.

As described above, the touch display device according to theembodiments of the present disclosure can sense a touch using either amutual-capacitance based touch sensing method or a self-capacitancebased touch sensing method.

Meanwhile, in the touch display device according to embodiments of thepresent disclosure, the touch panel TSP can be of a built-in type, whichcan be manufactured together with the display panel DISP to be equippedinside the display panel DISP. Thus, the display panel DISP according toembodiments of the present disclosure can be provided with the touchpanel TSP in a built-in type.

Further, in embodiments of the present disclosure, the touch electrodes320 and the touch lines 230 can be electrodes and signal wiringsarranged within the display panel DISP.

On the other hand, the display panel DISP of the touch display deviceaccording to embodiments of the present disclosure can be of aself-luminous display panel of such as e.g., an OLED panel type, aquantum dot panel type, a micro LED panel, or the like.

FIG. 5 is a diagram illustrating a mesh-type touch electrode disposed ona touch panel TSP in a flexible touch display device according toembodiments of the present disclosure.

Referring now to FIG. 5 , in the flexible touch display device accordingto embodiments of the present disclosure, each of the plurality of touchelectrodes 320 disposed on the touch panel TSP can be of a non-meshtype.

A mesh-type of touch electrode 320 can be made of an electrode metal EMpatterned in a mesh-type.

Accordingly, a plurality of open areas OA can exist in the area of themesh-type of touch electrode 320.

FIG. 6 is a diagram for explaining a corresponding relationship betweena mesh-type touch electrode and a sub-pixel disposed on a touch panelTSP in a flexible touch display device according to exemplaryembodiments of the present disclosure.

Referring now to FIG. 6 , each of a plurality of open areas OA formed inthe area of the touch electrode 320 made of electrode metal (EM)patterned in a mesh type can correspond to a light emitting area of oneor more sub-pixels.

For example, each of the plurality of open areas OA existing in the areaof one touch electrode 320 can correspond to one or more light emittingareas of a red sub-pixel, a green sub-pixel, a blue sub-pixel or thelike.

As another example, each of the plurality of open areas OA existing inthe area of one touch electrode 320 can correspond to one or more lightemitting areas of a red sub-pixel, a green sub-pixel, a blue sub-pixel,a white sub-pixel, and so on.

As described above, as viewed in a plan view, one or more light emittingregions of sub-pixels can exist in each of the open regions OA of eachtouch electrode 320, thereby enabling an effective touch sensing as wellas further enhancing the aperture ratio and the luminous efficiency ofthe display panel DISP.

As described above, a general profile of the outer periphery of onetouch electrode 320 can be in a form of e.g., rhombus or rectangle(possibly, inclusive of square), and an open area OA corresponding to ahole in one touch electrode 320 can be also in a form of a rhombus or arectangle (possibly, inclusive of a square), although not limitedthereto.

However, the shapes of the touch electrode 320 and the open area OA canbe variously modified and designed depending on the shape of thesub-pixels, the arrangement structure of the sub-pixels, the touchsensitivity, and so on.

Therefore, hereinafter, description will be made to a sub-pixelstructure (sub-pixel circuit) in a display panel for displaying imagesusing an organic light emitting diode (OLED).

FIGS. 7 and 8 are circuit diagrams illustrating a sub-pixel circuit of adisplay panel according to exemplary embodiments of the presentdisclosure.

Referring to FIGS. 7 and 8 , each sub-pixel SP can basically include anorganic light emitting device OLED and a driving transistor DRT fordriving the organic light emitting device OLED.

Referring now to FIG. 7 , each sub-pixel SP can be configured to includea first transistor T1 for transferring a data voltage VDATA to a firstnode N1 corresponding to a gate node of the driving transistor DRT, anda storage capacitor C1 for maintaining the data voltage VDATAcorresponding to an image signal voltage or any voltage correspondingthereto, for a time duration of one frame.

The organic light emitting device OLED can be configured to include afirst electrode E1 (e.g. an anode electrode or a cathode electrode), alight emitting layer 760, and a second electrode E2 (e.g., a cathodeelectrode or an anode electrode).

As an example, a base voltage EVSS can be applied to a second electrode770 of the organic light emitting device OLED.

The driving transistor DRT can supply a driving current to the organiclight emitting device OLED to drive the organic light emitting deviceOLED.

The driving transistor DRT can have a first node N1, a second node N2,and a third node N3.

The first node N1 of the driving transistor DRT can be a nodecorresponding to a gate node and can be electrically connected to asource node or a drain node of the first transistor T1.

The second node N2 of the driving transistor DRT can be electricallyconnected to the first electrode 750 of the organic light emittingdevice OLED, and can be a source node or a drain node.

The third node N3 of the driving transistor DRT is a node to which adriving voltage EVDD is applied, and it can be electrically connected toa driving voltage line DVL supplying the driving voltage EVDD and be adrain node or a source node.

The driving transistor DRT and the first transistor T1 can beimplemented as an n-type or a p-type.

The first transistor T1 can be electrically connected between the dataline DL and the first node N1 of the driving transistor DRT, and becontrolled by receiving a scan signal SCAN at the gate node through thegate line GL.

The first transistor T1 can be turned on by the scan signal SCAN totransfer the data voltage VDATA supplied from the data line DL to thefirst node N1 of the driving transistor DRT.

The storage capacitor C1 can be electrically connected between the firstnode N1 and the second node N2 of the driving transistor DRT.

The storage capacitor C1 is not a parasitic capacitor (e.g., Cgs, Cgd)that is an internal capacitor existing between the first node N1 and thesecond node N2 of the driving transistor DRT, but it is an externalcapacitor intentionally designed to be arranged outside the drivingtransistor DRT.

Referring then to FIG. 8 , each sub-pixel disposed on the display panelaccording to the embodiments can further include an organic lightemitting device OLED, a driving transistor DRT, a first transistor T1,and a storage capacitor C1 as well as a second transistor T2.

The second transistor T2 can be electrically connected between thesecond node N2 of the driving transistor DRT and a reference voltageline RVL supplying a reference voltage VREF, and can be controlled byreceiving at the gate node a sensing signal SENSE which is a kind ofscan signal.

Further inclusion of the second transistor T2 makes it possible toeffectively control the voltage state of the second node N2 of thedriving transistor DRT within the sub-pixel SP.

This second transistor T2 can be turned on by the sensing signal SENSEto apply the reference voltage VREF supplied through the referencevoltage line RVL to the second node N2 of the driving transistor DRT.

The sub-pixel structure of FIG. 8 can be advantageous in accuratelyinitializing the voltage of the second node N2 of the driving transistorDRT, and particularly advantageous in sensing the inherentcharacteristic value (e.g., threshold voltage or mobility) of thedriving transistor DRT, the inherent characteristic value (e.g.,threshold voltage) of the organic light emitting device OLED or thelike.

Meanwhile, the scan signal SCAN and the sensing signal SENSE can beseparate gate signals. In this case, the scan signal SCAN and thesensing signal SENSE can be respectively applied to the gate node of thefirst transistor T1 and the gate node of the second transistor T2,through different gate lines.

In some cases, the scan signal SCAN and the sensing signal SENSE can beof the same gate signal. In this case, the scan signal SCAN and thesensing signal SENSE can be commonly applied to the gate node of thefirst transistor T1 and the gate node of the second transistor T2,through the same gate line.

FIG. 9 is a diagram illustrating a position of a touch electrode in adisplay panel according to embodiments of the present disclosure.

Referring now to FIG. 9 , in the display panel according to embodimentsof the present disclosure, the touch electrode 320 can be disposed on anencapsulation layer 990 positioned on the organic light emitting deviceOLED.

Here, the encapsulation layer 990 can be a layer to protect an organicmaterial included in the light emitting layer 760 from moisture, air,and so on, and can be disposed on the second electrode 770 of theorganic light emitting device (OLED), which can be a cathode electrode.

Meanwhile, the encapsulation layer 990 can be made of a metal, aninorganic material, or can be formed by stacking one or more organicinsulating films and one or more inorganic insulating films.

For such a reason, a touch structure in which the touch electrode 320 isformed on the encapsulation layer 990 can be referred to as a TOE (Touchon Encapsulation Layer).

In the meantime, a color filter layer can be further disposed betweenthe encapsulation layer 990 and the touch electrode 320, or the colorfilter layer can be further disposed on the touch electrode 320.

Accordingly, a potential difference can be induced between the secondelectrode 770 and the touch sensor TS to form a capacitance Cp.

The capacitance required for a touch sensing can be a capacitancebetween the touch electrodes 320 or a capacitance between the touchelectrode 320 and a touch object (e.g., a finger, a pen, etc.).

A planarization layer 950 can be positioned on the touch electrode 320.The planarization layer 950 can make planarization of the unevennessformed by the touch electrode 320. A touch substrate such as e.g., aglass substrate or a plastic substrate can be disposed on theplanarization layer 950.

Meanwhile, the luminance in the display panel DISP according toembodiments of the present disclosure can vary depending on the amountof light emitted from the organic light emitting device disposed in theactive area A/A and transmitted to the outside. In other words, thetransmitted amount of light emitted from the organic light emittingdevice increases, the luminance of the display panel DISP can beimproved further.

FIG. 10 is a plan view illustrating sub-pixels and light emittingregions included in an active area of a display panel according toembodiments of the present disclosure.

Referring now to FIG. 10 , the active area A/A of the touch displaydevice according to embodiments of the present disclosure can include aplurality of sub-pixels, each of which sub-pixels can include at leastone light emitting area 1010. The touch electrode 320 may be disposed ina non-lighting emitting area 1020 surrounding the light emitting area1010.

The light emitting area 1010 can include a first area 1011, a secondarea 1012, and a third area 1013.

The first area 1011 can be disposed in a center portion of the lightemitting area 1010. The center portion of the light emitting area 1010can refer to some area including the center of the light emitting area1010 of the entire light emitting area 1010 included in one sub-pixel.

The second area 1012 can be disposed in a peripheral portion of thelight emitting area 1010. The peripheral portion of the light emittingarea 1010 can refer to some area including the outermost portion of thelight emitting area 1010, except for the center portion of the entireemitting area 1010 included in one sub-pixel.

The third area 1013 can be an area located between the first area 1011and the second area 1012 and having a lower luminance than those of thefirst area 1011 and the second area 1012.

The first area 1011 can be a main light emitting area of the lightemitting area 1010. The fact that the first area 1011 is the main lightemitting area of the light emitting area 1010 can imply that the area ofthe first area 1011 is larger than that of the second area 1012 and alsolarger than that of the third area 1013. As such, the area of the firstarea 1011 can be the largest of the first area 1011, the second area1012 and the third area 1013.

For the sake of explanation, the light emitting area 1010 has beendivided into a first area 1011, a second area 1012, and a third area1013, but the first area 1011, second area 1012 and third area 1013 maynot be clearly distinguished because they are located apart from eachother. The first area 1011, the second area 1012, and the third area1013 can be then connected to each other continuously while keeping theaforementioned characteristics. Accordingly, the light emitting area1010 can be viewed as a single region as a whole, but the luminance inboth the central portion (i.e., first area) and the peripheral portion(i.e., second area) can be higher than that of the middle portion (i.e.,third area) of the central portion and the peripheral portion.

FIG. 11 is a diagram illustrating a region cut along a line A-B of FIG.10 and a part of a non-active area. FIG. 11 can be a diagramillustrating one sub-pixel SP area in the touch display device accordingto exemplary embodiments of the present disclosure, specifically showinga part of the non-active area.

Referring now to FIG. 11 , the touch display device according toembodiments of the present disclosure can include a substrate 1110, aninsulating film 1140 disposed on the substrate, a first electrode 750disposed on the insulating film 1140, a bank 1180 positioned on thefirst electrode 750 and the insulating film 1140, a light emitting layer760 disposed on the first electrode 750, a second electrode 770 disposedon the light emitting layer 760 and the bank 1180, an encapsulationlayer 990 disposed on the second electrode 770, a touch buffer layerdisposed on the encapsulation layer 990, a plurality of touch electrodes320 disposed on the touch buffer layer, and a planarization layer 950disposed on the touch electrode 320.

The touch display device can include a transistor TR positioned on thesubstrate 1110 and an organic light emitting device OLED electricallyconnected to the transistor TR, in the active area (A/A, A-B cut area).

The transistor TR can include an active layer 1121, a gate electrode1123, a source electrode 1124 and a drain electrode 1125.

The organic light emitting device OLED can include a first electrode750, a light emitting layer 760 having at least one light emittinglayer, and a second electrode 770. Here, the first electrode 750 can bean anode electrode, and the second electrode 770 can be a cathodeelectrode, but the embodiments of the present disclosure are not limitedthereto.

More specifically, a buffer layer 1111 can be disposed on the substrate1110. An active layer 1121 of the transistor TR can be disposed on thebuffer layer 1111. A gate insulating film 1122 can be disposed on theactive layer 1121, and a gate electrode 1123 can be disposed on the gateinsulating film 1122.

Meanwhile, although not specifically illustrated in FIG. 11 , the activelayer 1121 according to the exemplary embodiments of the presentdisclosure can include a channel area, and the channel area of theactive layer 1121 can overlap the gate insulating film 1122 and the gateelectrode. 1123). The gate insulating film 1122 and the gate electrode1123 can be disposed on the channel area of the active layer 1121.

An interlayer insulating film 1112 can be disposed on the gate electrode1123. A source electrode 1124 and a drain electrode 1125 can be disposedon the interlayer insulating film 1112. The source electrode 1124 andthe drain electrode 1125 can be disposed on the interlayer insulatingfilm 1112 to be spaced apart from each other. Each of the sourceelectrode 1124 and the drain electrode 1125 can be disposed to contactthe active layer 1121 through a hole formed in the interlayer insulatingfilm 1112.

As described above, the transistor TR can be disposed on the substrate1110, but the structure of the transistors according to the embodimentsof the present disclosure is not limited thereto.

For example, the gate electrode 1123 can be disposed on the substrate1110, the active layer 1121 can be disposed on the gate electrode 1123,the source electrode 1124 can be disposed on the active layer 1121 tooverlap one end of the active layer 1121, and the drain electrode 1125can be disposed to overlap the other end of the active layer 1121.

A passivation film 1113 can be disposed for covering the transistor TR.

An insulating film 1140 can be disposed on the passivation film 1113.

The insulating film 1140 can be formed of an organic material, but theembodiments of the present disclosure are not limited thereto.

This insulating film 1140 can include at least one concave (recessed)portion 1143 in one sub-pixel area. The insulating film 1140 cansurround the concave portion 1143 and can include a peripheral portion1144 positioned around the concave portion 1143. The concave portion1143 can include a flat portion 1141 and an inclined portion 1142surrounding the flat portion 1141.

The flat portion 1141 of the concave portion 1143 can have a surfaceportion parallel to the surface of the substrate 1110, and the inclinedportion 1142 can have a surface portion formed at a predetermined anglewith the surface of the substrate 1110, surrounding the flat portion1141. For example, the surface of the inclined portion 1142 may not beparallel to the surface of the substrate 1110.

Further, the insulating film 1140 can include a contact hole spacedapart from the concave portion 1143.

Then, the first electrode 750 can be disposed on the peripheral portion1144 and the concave portion 1143 of the insulating film 1140 in atleast one sub-pixel area.

Meanwhile, the first electrode 750 can include a first area 751 in whicha top surface of the first electrode 750 is parallel to the surface ofthe substrate 1110 in a region overlapping the concave portion 1143, anda second area 752 extending from the first area 751, the top surface ofthe first electrode 750 forming a predetermined angle from the substrate1110. For example, the surface of the second area 752 may not beparallel to the surface of the substrate 1110. Furthermore, the firstelectrode 750 can extend from the second area 752 and include a thirdarea 753 in which the top surface of the first electrode 750 is parallelto the surface of the substrate 1110. The third area 753 can be an areaoverlapping the peripheral portion 1144 around the concave portion 1143.

Further, as described above, the insulating film 1140 can include atleast one contact hole spaced apart from the concave portion 1143 in theat least one sub-pixel region, and the transistor TR and the firstelectrode 750 of the organic light emitting device OLED can beelectrically connected to each other via the contact hole of theinsulating film 1140.

Specifically, the first electrode 750 can be electrically connected tothe source electrode 1124 or the drain electrode 1125 of the transistorTR.

As illustrated in FIG. 11 , a bank 1180 can be disposed on some parts ofthe insulating film 1140 and the first electrode 750.

The bank 1180 can include a first portion 1181 disposed on the firstelectrode 750 in a region corresponding to a portion of the concaveportion 1143 formed in the insulating film 1140, and a second portion1182 disposed on the first electrode 750 and the insulating film 1140 ina region corresponding to the peripheral portion 1144 formed in theinsulating film 1140.

Such a bank 1180 can have an opening area to expose a part of the topsurface of the first electrode 750 in an area overlapping the concaveportion 1143, which opening area can correspond to a part of the flatportion 1141. When the opening area corresponds to a part of the flatportion 1141, it can imply that the opening area is formed to overlap apart of the flat portion 1141 in a sub-pixel. Accordingly, at least onesub-pixel can have a region in which the first electrode 750 does notoverlap the bank 1180.

A light emitting layer 760 of the organic light emitting device OLED canbe disposed on the first electrode 750 that is not overlapped with thebank 1180. The light emitting layer 760 can be disposed on the firstelectrode 750 and the bank.

A second electrode 770 of the organic light emitting device OLED can bedisposed on the light emitting layer 760.

Meanwhile, the light emitting layer 760 of the organic light emittingdevice OLED can be formed by a linear deposition or coating methodhaving straightness. For example, the light emitting layer 760 can beformed by a physical vapor deposition (PVD) such as e.g., an evaporationprocess.

The light emitting layer 760 formed in such a method can have a lessthickness in a region having a predetermined angle with respect to thesubstrate 1110 than in a region parallel to the substrate 1110.

For example, the thickness of the light emitting layer 760 disposed inthe region corresponding to the inclined part 1142 of the concaveportion 1143 can be thinner than that of the light emitting layer 760disposed on the top surface of the first electrode 750 exposed by thebank 1180. Further, the thickness of the light emitting layer 760disposed in the region corresponding to the inclined portion 1142 of theconcave portion 1143 can be thinner than that of the light emittinglayer 760 disposed on the peripheral portion 1144 around the concaveportion 1143.

Accordingly, when the organic light emitting device OLED is driven, thehighest amount of current density can be induced in the region in whichthe thickness of the light emitting layer 760 is formed relatively thin,for example, the region corresponding to the inclined portion 1142 ofthe concave portion 1143, and strong electric field can be induced inthe region corresponding to the inclined portion 1142 of the concaveportion 1143.

Accordingly, the light emitting characteristics of the organic lightemitting device OLED in the region corresponding to the inclined portion1142 of the concave portion 1143 can be different from the lightemitting characteristics of the organic light emitting device OLED inthe region corresponding to the flat portion 1141 of the concave portion1143, thereby resulting in deterioration of the corresponding device.

In the embodiment of the present invention, such an arrangement that thebank 1180 is disposed so as to cover the inclined portion 1142 of theconcave portion 1143 makes it possible to prevent deterioration of thedevice in the region corresponding to the inclined portion 1142 of theconcave portion 1143 as well as prevent occurrence of a phenomenon thatthe emission characteristics become different for each region.

However, it should be noted that the thickness condition of the lightemitting layer 760 in the present disclosure is not limited thereto, andthe thickness of the light emitting layer 760 can have a correspondingthickness for each position.

In the meantime, the first electrode 750 can include a reflective metal.Although FIG. 11 shows a configuration of the first electrode 750 with asingle layer, the embodiments of the present disclosure are not limitedthereto and instead, it can be formed of multiple layers. When the firstelectrode 750 is formed of multiple layers, at least one layer thereofcan include a reflective metal.

As an example, the first electrode 750 can include at least one ofaluminum, neodymium, nickel, titanium, tantalum, copper (Cu), silver(Ag), and aluminum alloy, but the embodiments of the present disclosureare not limited thereto.

The second electrode 770 can include a conductive material through whichlight is transmitted or semi-transmitted. For example, it can include atleast one kind of transparent conducting oxide such as, for example,indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide(ITZO), zinc oxide, tin oxide or the like, or a transflective metal suchas, for example, magnesium, silver, an alloy of magnesium and silver orthe like.

Here, when the second electrode 770 includes a transflective metal, thethickness of the second electrode 770 can be thinner than that of thefirst electrode 750.

Further, as shown in FIG. 11 , an auxiliary electrode (or can bereferred to as “auxiliary wiring”) 1130 in contact with the secondelectrode 770 can be disposed in a region corresponding to anon-lighting area 1020 in the active area A/A.

More specifically, the auxiliary electrode 1130 can be disposed on theinterlayer insulating film 1112. In addition, the passivation film 1113,the insulating film 1140 and the bank 1180 can have a hole to expose theauxiliary electrode 1130. The second electrode 770 can be in contactwith the auxiliary electrode 1130 through the hole in the passivationfilm 1113, the insulating film 1140 and the bank 1180 to expose theauxiliary electrode 1130.

When the organic light-emitting display panel is of a large area displaypanel, a voltage drop due to resistance in the second electrode 770 canoccur, leading to a difference in luminance in between the outer portionof the panel and the central portion. However, according to the organiclight emitting display panel of the present disclosure, it is possibleto prevent such a voltage drop from being generated through theauxiliary electrode 1130 in contact with the second electrode 770.Accordingly, in case where the organic light-emitting display panelaccording to the exemplary embodiment of the present invention is of alarge area panel, it will provide an effect capable of preventinggeneration of any difference in luminance of the panel.

Although FIG. 11 illustrates a configuration that one auxiliaryelectrode 1130 is disposed in one sub-pixel SP, the embodiments of thepresent disclosure are not limited thereto. For example, one auxiliaryelectrode 1130 can be disposed for a multiplicity of sub-pixels SP.

Further, the position of the auxiliary electrode 1130 illustrated inFIG. 11 can be merely of an example, and the position of the auxiliaryelectrode 1130 is not limited to that shown in FIG. 11 .

Further, when the organic light-emitting display panel according toexemplary embodiments of the present disclosure is not a large areapanel, it may not include such an auxiliary electrode 1130.

Then, as illustrated in FIG. 11 , a storage capacitor Cst can bearranged in the active area A/A. The storage capacitor Cst can include afirst storage capacitor electrode 1131 disposed on the same layer as thegate electrode 1123, and a second storage capacitor electrode 1132disposed on the same layer as the source electrode 1124 and the drainelectrode 1125, but the structure of the storage capacitor Cst accordingto the present invention is not limited thereto.

At least one encapsulation layer 990 can be then disposed on the secondelectrode 770 of the organic light emitting device OLED.

For example, the encapsulation layer 990 can include a firstencapsulation layer 1191 disposed on the second electrode 770, a secondencapsulation layer 1192 disposed on the first encapsulation layer 1191,and a third encapsulation layer 1193 disposed on the secondencapsulation layer 1192.

As described above, when the encapsulation layer 990 is formed ofmultiple layers, at least one layer can include an inorganic insulatingmaterial, and at least the other layer can include an organic insulatingmaterial.

In the embodiments of the present disclosure, the first encapsulationlayer 1191 and the third encapsulation layer 1193 can include aninorganic insulating material, and the second encapsulation layer 1192can include an organic insulating material, but they are not limitedthereto.

This encapsulation layer 990 can be disposed on the organic lightemitting device OLED to prevent moisture or foreign matters frompenetrating into the organic light emitting device OLED.

Meanwhile, FIG. 11 shows a configuration that the encapsulation layer990 is disposed in the active area A/A, but the embodiments of thepresent disclosure are not limited thereto, and the encapsulation layer990 can be disposed to extend to a part of the active area A/A.

The touch buffer layer may include a first touch buffer layer 1194 and asecond touch buffer layer 1195. The first touch buffer layer 1194 can bedisposed on the third encapsulation layer 1193.

A plurality of bridge patterns 396 can be then disposed on the firsttouch buffer layer 1194, and a second touch buffer layer 1195 can bedisposed on the bridge pattern 396.

Further, a plurality of touch electrodes 320 can be disposed on thesecond touch buffer layer 1195, and the plurality of touch electrodes320 can come into contact with the bridge pattern 396 through a holeformed in the second touch buffer layer 1195.

In the meantime, the plurality of touch electrodes 320 can betransparent electrodes or opaque electrodes.

An area in which a top surface of the first electrode 750 is exposedthrough the opening area of the bank 1180 can be an area correspondingto the first area 1011 of the touch display device.

As described with reference to FIG. 10 , the touch electrode 320 can bedisposed in a non-lighting emitting area 1020 surrounding the lightemitting area 1010. As the touch electrode 320 is positioned in thenon-lighting area 1020, it is possible to effectively prevent a decreasein luminance due to the touch electrode 320.

The touch electrode 320 can be not positioned in an area correspondingto the flat portion 1141 within the sub-pixel SP, and it can be notpositioned in an area corresponding to the inclined portion 1142 withinthe sub-pixel SP. For example, the touch electrode 320 may not bedisposed in a region corresponding to the concave portion 1143 withinthe sub-pixel SP.

The fact that the touch electrode 320 is not positioned in an areacorresponding to the flat portion 1141 in the sub-pixel SP can implythat the touch electrode 320 in the sub-pixel SP does not overlap theflat portion 1141.

The fact that the touch electrode 320 is not positioned in an areacorresponding to the inclined portion 1142 in the sub-pixel SP can implythat the touch electrode 320 in the sub-pixel SP does not overlap theinclined portion 1142.

The fact that the touch electrode 320 is not positioned in the areacorresponding to the concave portion 1143 in the sub-pixel SP can meanthat the touch electrode 320 in the sub-pixel SP does not overlap theconcave portion 1143.

Positioning the touch electrode 320 not to overlap with the concaveportion 1143, as described above, will make it possible to prevent lightintensity from decreasing due to blocking of the light emitted from thelight emitting layer 760 by the touch electrode 320 or transmittingthrough the touch electrode 320, thereby resulting in improved luminanceof the touch display device.

A planarization layer 950 can be disposed on the touch electrode 320.The planarization layer 950, which is a layer for flattening anyirregularities formed by the touch electrode 320, can be formed of, forexample, an organic material.

As the display device according to embodiments of the present disclosureis provided with the planarization layer 950 including a microlens unit1151, it makes it possible to extract light trapped in the touchsubstrate due to total reflection or the like, thereby providing a touchdisplay device with more excellent luminance.

The microlens unit 1151 can be disposed in a region corresponding to theconcave portion 1143. Such an arrangement the microlens unit 1151 isdisposed in the region corresponding to the concave portion 1143 canmean that, for example, in one sub-pixel, the microlens unit 1151 ispositioned in a substantially same area as the concave portion 1143. Asthe microlens unit 1151 is positioned in the region corresponding to theconcave portion 1143, it is possible to make effective dispersion ofe.g., the light emitted from the light emitting layer 760 to the outsideof the touch display device, and the light emitted from the lightemitting layer 760 and then reflected onto a reflective metal includedin the first electrode 750 positioned at the inclined portion 1142 ofthe concave portion 1143, then being emitted to the outside of the touchdisplay device. The light dispersed by the microlens unit 1151 can beextracted outside the touch display device without undergoing a totalreflection at an interface between the touch display device and outsideair, so that the luminance of the touch display device can be furtherimproved owing to the microlens unit 1151.

The microlens unit 1151 can include a plurality of microlenses 1152. Theplurality of microlenses 1152 can be circular in a cross section A-B ofthe active area A/A of the touch display device. The microlenses 1152can have a hemispherical shape in which a central portion of themicrolens 1152 is concave than a peripheral portion. When the microlens1152 has such a shape, the light emitted from the light emitting layer760 can be effectively dispersed to improve the brightness of the touchdisplay device.

The microlens unit 1151 can include at least one microlens 1152 of whichcenter is positioned in a region corresponding to the inclined portion1142 of the concave portion 1143 in the sub-pixel SP.

The microlens unit 1151 can include at least one microlens 1152, ofwhich part is positioned in a region corresponding to the inclinedportion 1142 of the concave portion 1143 within the sub-pixel SP. Such amicrolens can be disposed in a region overlapping the second area 752 ofthe first electrode 750 disposed on the inclined portion 1142. The atleast one microlens 1152 has a diameter larger than a width of an areacorresponding to the inclined portion 1142 of the concave portion 1143.In the abovementioned sub-pixel SP, an area corresponding to theinclined portion 1142 may mean an area corresponding to the inclinedportion 1142 indicated by dotted lines in FIG. 11 .

Throughout the specification, the above microlens 1152 described abovecan be referred to as a “first peripheral microlens”. Light emitted fromthe light emitting layer 760 and reflected onto the second area 752 ofthe first electrode 750 can be dispersed by the peripheral microlens.The dispersion of light by means of the peripheral microlens makes itpossible to reduce the difference in luminance between the first area1011, the second area 1012 and the third area 1013 of the light emittingregion 1010.

The first area 1011 can correspond to the flat portion 1141 of theconcave portion 1143. The fact that the first area 1011 corresponds tothe flat portion 1141 can mean that the first area 1011 can overlap theflat portion 1141 in the sub-pixel SP. Part of the at least onemicrolens 1152 is disposed in an area corresponding to the second area1012 in the one sub-pixel SP. The at least one microlens 1152 has adiameter larger than a width of the area corresponding to the secondarea 1012.

In the first area 1011 of the light emitting region 1010, a main lightsource can be the light emitted from the light emitting layer 760 andextracted to the outside of the touch display device without anyreflection onto the first electrode 750 positioned on the inclinedportion 114, rather than the light emitted from the light emitting layer760 positioned on the flat portion 1141 and then reflected onto thefirst electrode 750 positioned on the inclined portion 1142 to beextracted to the outside of the touch display device.

The second area 1012 can correspond to the inclined portion 1142 of theconcave portion 1143. The fact that the second area 1012 corresponds tothe inclined portion 1142 can mean that the second area 1012 can overlapthe inclined portion 1142 in the sub-pixel SP.

In the second area 1012 of the light emitting area 1010, a main lightsource can be the light emitted from the light emitting layer 760 andthen reflected onto the first electrode 750 positioned on the inclinedportion 1142 to be extracted to the outside of the touch display device,rather than the light emitted from the light emitting layer 760 anddirectly extracted outside the touch display device without anyreflection onto the first electrode 750 positioned on the inclinedportion 1142.

The microlens unit 1151 can have any different structure for improvingthe luminance of the touch display device.

Further, on the planarization layer 950 can be further disposed a secondplanarization layer for planarizing the planarization layer 950including the microlens unit 1151.

The second planarization layer can be formed of, for example, an organicmaterial, and it can be preferably formed of an optically transparentstickiness or adhesive material. The second planarization layer caninclude, for example, one or more polymers selected from epoxy-basedpolymers and acrylic-based polymers.

A polarizing plate can be disposed on the second planarization layer.The polarizing plate can serve to prevent visibility of the touchdisplay device from decreasing owing to the reflection of lightirradiated to the touch display device from the outside of the touchdisplay device, by the display panel of the touch display device.

A cover glass can be disposed on the polarizing plate. This cover glasscan be formed of, for example, a glass substrate, but it can be apolymer plastic substrate.

The touch display device according to embodiments of the presentdisclosure makes it possible for each layer included in the touchdisplay device to fulfill a specific refractive index relationship so asto maximize its light extraction.

For example, the refractive index of the bank 1180 can be lower thanthat of the light emitting layer 760. When the refractive index of thebank 1180 is lower than the refractive index of the light emitting layer760, the display panel can provide more excellent light extractionefficiency.

For example, the refractive index of the second electrode 770 can belower than the refractive index of the light emitting layer 760 and alsolower than the refractive index of the first encapsulation layer 1191.When the refractive index of the second electrode 770 is lower than therefractive index of the light emitting layer 760 and the firstencapsulation layer 1191, the display panel can have more excellentlight extraction efficiency.

For example, the refractive index of the second encapsulation layer 1192can be lower than the refractive index of the first encapsulation layer1191 and also lower than the refractive index of the third encapsulationlayer 1193. When the refractive index of the second encapsulation layer1192 is lower than that of the first encapsulation layer 1191 and thethird encapsulation layer 1193, the display panel can have moreexcellent light extraction efficiency.

For example, the refractive index of the second touch buffer layer 1195can be lower than the refractive index of the third encapsulation layer1193 and higher than the refractive index of the planarization layer950. When the refractive index of the second touch buffer layer 1195 islower than the refractive index of the third encapsulation layer 1193and higher than the refractive index of the planarization layer 950, thedisplay panel can have more excellent light extraction efficiency.

As an example, the refractive index of each layer included in the touchdisplay panel can fall within a range to satisfy the above-describedrefractive index relationship, as follows: the refractive index of thelight emitting layer 760 can be 1.6 to 1.9 or 1.7 to 1.8; the refractiveindex of the bank can be 1.40 to 1.57 or 1.45 to 1.55; the refractiveindex of the second electrode 770 can be 0.2 to 0.4 or 0.25 to 0.35; therefractive index of the first encapsulation layer 1191 can be 1.63 to1.85 or 1.64 To 1.82; the refractive index of the second encapsulationlayer 1192 can be 1.4 to 1.7 or 1.55 to 1.65; the refractive index ofthe third encapsulation layer 1193 can be 1.82 to 1.9 or 1.85 to 1.88;the refractive index of the second touch buffer layer 1195 can be 1.7 to1.82 or 1.75 to 1.81; and the refractive index of the planarizationlayer 950 can be 1.45 to 1.69 or 1.5 to 1.6.

FIG. 12 is a view for illustrating the touch display device according toembodiments of the present disclosure, which has the microlens unit 1151with a plurality of microlenses 1153 and 1154 different from theembodiments shown in FIG. 11 .

When describing the embodiments shown in FIG. 12 , the contents(including configuration, effects, etc.) that are overlapped with theforegoing embodiments can be omitted for the clarity of explanation.

Referring now to FIG. 12 , the microlens unit 1151 can include amicrolens 1154 arranged in the area corresponding to the inclinedportion 1142, with a diameter corresponding to a width of a regioncorresponding to the inclined portion 1142 in the sub-pixel SP.Throughout this specification, such a microlens 1154 can be referred toas a “second peripheral microlens”.

In the abovementioned sub-pixel SP, an area corresponding to theinclined portion 1142 can mean an area corresponding to the inclinedportion 1142 indicated by dotted lines in FIG. 12 . For example, thearea in the sub-pixel SP corresponding to the inclined portion 1142 canimply an area overlapping the inclined portion 1142 of the region asobserved in the sub-pixel SP.

The diameter corresponding to the width of the area corresponding to theinclined portion 1142 in the sub-pixel SP can mean substantially thesame diameter as the width of the area corresponding to the inclinedportion 1142 in the sub-pixel SP.

Such an arrangement that the microlens unit 1151 includes the secondperipheral microlens makes it possible to reduce the difference inluminance between the first area 1011, the second area 1012, and thethird area 1013 of the light emitting region 1010, so that the touchdisplay device can have more excellent luminance.

The microlens unit 1151 can include at least one microlens 1153positioned in a region corresponding to the flat portion 1141, with adiameter corresponding to a width of a region corresponding to the flatportion 1141 within the sub-pixel SP. Throughout this specification,such a microlens 1153 can be referred to as a “central microlens”.

An area corresponding to the flat portion 1141 in the sub-pixel SP canmean an area corresponding to the flat portion 1141 indicated by dottedlines in FIG. 12 . In other words, the region corresponding to the flatportion 1141 in the sub-pixel SP can mean a region overlapping the flatportion 1141, in the area observed from the sub-pixel SP.

The diameter corresponding to the width of the region corresponding tothe flat portion 1141 in the sub-pixel SP can imply substantially thesame diameter as the width of the region corresponding to the flatportion 1141 in the sub-pixel SP. As mentioned above, the first area1011 may correspond to the flat portion 1141 of the concave portion1143, and the second area 1012 may correspond to the inclined portion1142 of the concave portion 1143. A diameter of microlens 154corresponds to a width of an area corresponding to the second area 1012in the sub-pixel SP and disposed in the area corresponding to the secondarea 1012. A diameter of the at least one microlens 153 corresponds to awidth of an area corresponding to the first area 1011 in the sub-pixelSP and disposed in the area corresponding to the first area 1011.

As the microlens unit 1151 includes such a central microlens, the lightemitted from the light emitting layer 760 to reach the central microlenscan be scattered, so that the light trapped inside the touch displaydevice by total reflection can be reduced, thereby providing the touchdisplay device with more excellent luminance.

FIG. 13 shows an enlarged view of the area Y of FIGS. 11 and 12 .

Referring now to FIG. 13 , the height H1 of the inclined portion 1142 ofthe insulating film 1140 (or the depth of the concave portion) can beabout 0.7 μm or more, wherein the height H1 of the inclined portion 1142means the shortest distance from the line extending parallel to thesurface of the substrate 1110 to the peripheral portion 1144 on thesurface of the flat portion 1141 of the concave portion 1143.

Meanwhile, in the exemplary embodiment of the present invention, theheight H1 of the insulating film 1140 in which the inclined portion 1142of the concave portion 1143 is positioned is not limited only to theaforementioned value. For example, the height H1 would be sufficient ifthe concave portion 443 of the insulating film 1140 is configured tohave a height such that the elements disposed beneath the insulatingfilm 1140 are not exposed.

The height H1 of the inclined portion 1142 can be higher than the heightof the bank 1180 disposed on the peripheral portion 1144 around theconcave portion 1143. In another aspect, the height H1 of the inclinedportion 1142 can be higher than the height of the second portion 1182 ofthe bank 1180.

As described above, as the height H1 of the inclined portion 1142increases, the amount of light reflected from the second area 1152 ofthe first electrode 750 increases, so that its light extractionefficiency can be improved accordingly.

Further, an angle “a” formed by the inclined portion 1142 of the concaveportion 1143 with respect to the horizontal plane can be in a range from27° to less than 80°.

When the angle “a” is less than 27°, the light emitted from the lightemitting layer 760 does not reach the first electrode 750 disposed onthe inclined portion 1142 and can be transmitted to other adjacentsub-pixels, resulting in a mixed color phenomenon, or being trappedinside the display device so that it cannot be extracted to its outside.

When the angle “a” exceeds 80°, disconnection can occur in theconfiguration such as e.g., the first electrode 750 or the like disposedon the inclined portion of the insulating film 1140.

Further, the distance W between the surface of the first electrode 750and the bank 1180 in the area corresponding to the inclined portion 1142of the concave portion 1143 can be no more than 3.2 μm, or preferably nomore than 2.6 μm or more preferably no more than 2.0 μm.

In another aspect, the distance W between the surface of the firstelectrode 750 and the bank 1180 in the second area 752 of the firstelectrode 750 can be no more than 3.2 μm, preferably no more than 2.6μm, or more preferably no more than 2.0 μm.

The smaller is the distance W, the more the area of the first area 1011can expand, so it can reduce the optical path of light reflected andextracted from the second area 752 of the first electrode 750, therebyresulting in more improved light extraction efficiency. Therefore, thelower limit of W value can be in a range of, for example, no less than0.1 μm or preferably, no less than 0.3 μm or more preferably, or 0.5 μmor more, although it is not particularly limited thereto.

By adjusting the range of W as described above, it is possible toprovide an organic light emitting display panel capable of improvinglight extraction efficiency while increasing the area of the first area1011.

Meanwhile, the color coordinates of the first area 1011 and the colorcoordinates of the second area 1012 can be different from or correspondto each other.

Hereinafter, an arrangement structure of a plurality of touch electrodes320 and touch lines will be described with reference to FIG. 14 .

FIG. 14 is a diagram illustrating an active region and a part of anon-active region extending from the active region.

In the following description, any contents (configuration, effects andso on) that are overlapped with the foregoing embodiments can be omittedfor the conciseness of description.

Referring now to FIG. 14 , a plurality of touch electrodes 320 and touchlines 1450 can be disposed on the second touch buffer layer 1195.

The touch electrodes 320 disposed in the same row (or the same column)can be electrically connected through a bridge pattern 396 to form onedriving touch electrode line or one sensing touch electrode line.

Although FIG. 14 illustrates a configuration in which the touchelectrode 320 and the touch line 1450 are positioned in the same layer,the present invention is not limited thereto, and the touch electrode320 and the touch line 1450 can be positioned on different layers.

Meanwhile, the touch line 1450 can be electrically connected to anauxiliary line 1460 disposed on the same layer as the bridge pattern396. Specifically, as shown in FIG. 14 , the touch line 1450 can comeinto contact with the auxiliary line 1460 disposed underneath the secondtouch buffer layer 1195 through a contact hole provided in the secondtouch buffer layer 1195.

Then, the touch line 1450 can be electrically connected to the auxiliaryline 1460, so that resistance of the touch line 1450 can be reduced.

The touch line 1450 and the touch electrode 320 can be electricallyconnected. Further, the touch line 1450 can be disposed on a dam 1420and extend to a pad portion PAD positioned outside the dam 1420. Thetouch line 1450 can be electrically connected to the pad portion PAD.

More specifically, the touch line 1450 can be electrically connected toa pad 1440 positioned in the pad portion PAD provided in the non-activearea N/A. As illustrated in FIG. 14 , the touch line 1450 is shown to beelectrically connected to the pad 1440 through a pad connectionelectrode 1130, but the present invention is not limited thereto. As anexample, the pad 1440 and the touch line 1450 can be directly connected.

The pad 1440 to which the touch line 1450 is connected can be connectedto a touch sensing circuit TSC. The touch sensing circuit TSC can serveto supply a touch driving signal to at least one of the plurality oftouch electrodes 320 and detect at least one of presence/absence of atouching and a touched position in response to the touch driving signal.

The touch line 1450, the third encapsulation layer 1193, and the firstand second touch buffer layers 1194 and 1195 can be disposed to overlapeach other on the dam 1420. However, such a structure is merely of anexample, and the touch line 1450 can be disposed to overlap at least oneof the third encapsulation layer 1193 and the first and second touchbuffer layers 1194 and 1195 on the dam 1420.

FIG. 14 shows a configuration of the dam 1420 including a first dam 1421and a second dam 1422 disposed outside the first dam 1421, but thepresent invention is limited thereto. In the disclosed embodiments, thenumber of dams 1420 can appropriately change according to the size ofthe display device as required.

FIG. 15 is a cross-sectional view illustrating a display deviceaccording to another exemplary embodiment of the present invention.

In the following description, any contents (configuration, effects,etc.) that are overlapped with the foregoing embodiments can be omittedfor the conciseness of description.

In the embodiment shown in FIG. 15 , the structure of the touchelectrode 320, the touch line and so on are the same as those shown inFIG. 14 , except for that the microlens unit 1151 included in theplanarization layer 950 corresponds to the microlens unit 1151 describedwith reference to FIG. 12 , unlike the embodiments described withreference to FIG. 14 .

FIGS. 11 to 15 each illustrate such a structure in which the touchelectrode 320 is connected through the bridge pattern 396, but thepresent invention is not limited thereto.

FIG. 16 is a cross-sectional view illustrating a display deviceaccording to another embodiments of the present disclosure.

In the following description, any contents (configuration, effects,etc.) that are overlapped with the foregoing embodiments can be omittedfor the conciseness of description.

Referring then to FIG. 16 , the touch electrode 1620 can be disposed onthe first touch buffer layer 1194. For example, the bridge pattern maynot exist underneath the touch electrode 1620.

Further, according to the arrangement structure of the organic layer inthe disclosed invention, modification can be made on the structure ofthe insulating film for making contact of the second electrode and theauxiliary electrode of the organic light emitting device OLED.

This structure will be further described with reference to FIG. 17 , asfollows.

FIG. 17 is a cross-sectional view illustrating a touch display deviceaccording to embodiments of the present disclosure.

In the following description, any contents (configuration, effects,etc.) that are overlapped with the foregoing embodiments can be omittedfor the conciseness of description.

Referring then to FIG. 17 , the light emitting layer 1760 of the organiclight emitting device OLED can be disposed to overlap the bank 1180 andthe first electrode 1750 in the active region A/A, and the auxiliaryelectrode 1130 can be arranged to expose the top surface.

With such a structure, for making contact between the second electrode1770 and the auxiliary electrode 1130, the bank 1180 can have astructure for preventing the material of the light emitting layer 1760from being deposited on the auxiliary electrode 1130 in the process offorming the light emitting layer 1760.

Specifically, as shown in FIG. 17 , the bank 1180 can have a shape inwhich the width of the bank 1180 increases as the distance from thesubstrate 1110 increases, in a region surrounding the hole to expose theauxiliary electrode 1130. In other words, as the bank 1180 is spacedapart from the substrate 1110, an entrance of the hole of the bank 1180exposing the auxiliary electrode 1130 can become narrower.

In the meantime, for the process of forming the light emitting layer1760, a linear deposition or coating method can be used in which a rawmaterial has a linear property. For example, an evaporation method canbe used. In addition, for the process of forming the second electrode1770, a non-linear deposition or coating method can be employed in whichthe directional property of the raw material is not uniform. Forexample, a sputtering method can be used.

Since the entrance of the hole of the bank 1180 exposing the auxiliaryelectrode 1130 is relatively narrow, the light emitting layer 1760 maynot be disposed on the auxiliary electrode 1130 due to its processcharacteristics of the light emitting layer 1760. Further, due to theprocess characteristics of the second electrode 1770, the raw materialof the second electrode 1770 might enter the hole even if the hole ofthe bank 1180 has a narrow entrance, so that the second electrode 1770can be formed on the auxiliary electrode 1130 as well.

The above description has been presented to enable any person skilled inthe art to make and use the technical idea of the disclosure, and hasbeen provided in the context of a particular application and itsrequirements. Various modifications, additions and substitutions to thedescribed embodiments will be readily apparent to those skilled in theart, and the general principles defined herein can be applied to otherembodiments and applications without departing from the spirit and scopeof the disclosure. The above description and the accompanying drawingsprovide an example of the technical idea of the disclosure forillustrative purposes only. For example, the disclosed embodiments areintended to illustrate the scope of the technical idea of thedisclosure. Thus, the scope of the disclosure is not limited to theembodiments shown, but is to be accorded the widest scope consistentwith the claims. The scope of protection of the disclosure should beconstrued based on the following claims, and all technical ideas withinthe scope of equivalents thereof should be construed as being includedwithin the scope of the disclosure.

What is claimed is:
 1. A touch display device, comprising: a substrateincluding an active area and a non-active area; a transistor disposed onthe substrate; a sub-pixel electrically connected to the transistor, andincluding an organic light emitting diode; an encapsulation layerdisposed on the organic light emitting diode; a planarization layerdisposed on the encapsulation layer; and a plurality of touch electrodesdisposed between the encapsulation layer and the planarization layer,the plurality of touch electrodes including an open area, wherein theplanarization layer includes a thickness variation at the open area ofthe plurality of touch electrodes.
 2. The touch display device accordingto claim 1, wherein the planarization layer includes a lens unit formedby the thickness variation of the planarization layer.
 3. The touchdisplay device according to claim 2, wherein the lens unit has a circleshape in a planar view, and has a circular or hemispherical shape in across sectional view.
 4. The touch display device according to claim 2,wherein the lens unit includes a plurality of lenses.
 5. The touchdisplay device according to claim 1, wherein the sub-pixel includes anemission area and a non-emission area, wherein the open area overlapsthe emission area, and wherein a thickness of the planarization layeroverlapping the non-emission area is constant.
 6. The touch displaydevice according to claim 1, wherein the open area of the plurality oftouch electrodes has a rhombus shape, a rectangle shape or a squareshape.
 7. The touch display device according to claim 1, wherein touchelectrodes disposed along a same row or column among the plurality oftouch electrodes are connected to each other via a bridge pattern toform one driving touch electrode line or one sensing touch electrodeline.
 8. The touch display device according to claim 10, furthercomprising a touch line electrically connected with the touch electrodesdisposed along the same row or column, wherein the touch line isdisposed on a same layer as the touch electrodes disposed along the samerow or column.
 9. The touch display device according to claim 8, furthercomprising an auxiliary line electrically connected with the touch line,wherein the auxiliary line is disposed on a same layer as the bridgepattern.
 10. The touch display device according to claim 1, furthercomprising a color filter layer disposed between the plurality of touchelectrodes and the encapsulation layer, or disposed on the plurality oftouch electrodes.
 11. The touch display device according to claim 1,further comprising an insulation film disposed between the transistorand the organic light emitting diode, wherein the insulation filmincludes a concave portion and a flat portion.
 12. The touch displaydevice according to claim 11, wherein the organic light emitting diodecomprises a first electrode, a light emitting layer and a secondelectrode, and wherein the first electrode is disposed on the concaveportion and the flat portion of the insulation film.
 13. The touchdisplay device according to claim 1, wherein the organic light emittingdiode comprises a first electrode, a light emitting layer and a secondelectrode, and wherein a lowermost surface of the second electrode islower than a topmost surface of the first electrode.
 14. The touchdisplay device according to claim 1, wherein the organic light emittingdiode comprises a first electrode, a light emitting layer and a secondelectrode, and wherein the first electrode includes a first portionparallel to the substrate, and a second portion inclined to thesubstrate.
 15. A touch display device, comprising: a substrate includingan active area and a non-active area; a transistor disposed on thesubstrate; a sub-pixel electrically connected to the transistor, andincluding a light emitting diode to emit light; an encapsulation layerdisposed on the light emitting diode; and a plurality of touchelectrodes disposed on the encapsulation layer, and including an openarea, wherein the open area includes a first luminance area of the lightand a second luminance area of the light.
 16. The touch display deviceof claim 15, wherein the open area further includes a third luminancearea between the first luminance area and the second luminance area, andwherein a luminance of the third luminance area is lower than luminancesof the first luminance area and the second luminance area.
 17. The touchdisplay device of claim 15, wherein the light emitting diode is anorganic light emitting diode.
 18. The touch display device of claim 15,further comprising a planarization layer disposed on the plurality oftouch electrodes, and including a thickness variation at the open areaof the plurality of touch electrodes.
 19. The touch display device ofclaim 15, further comprising a color filter layer disposed on theplurality of touch electrodes.
 20. The touch display device of claim 15,wherein an area of the first luminance area is equal to or greater thanan area of the second luminance area in size.